对于我的第一个 Arduino 项目,我决定制作一个 DM 控制台作为生日礼物送给一位儿时的挚友。
对于那些希望看到最终产品的人,请点击此链接。
它从功能和外观的草图开始:
中间有一个 LCD 屏幕,周围有大约 13 个按钮。1 个用于 D20 滚动的按钮,1 个用于随机金宝的按钮,5 个用于从文件中生成随机文本的按钮(魔法物品、怪物、NPC、法术、DM 决定),6 个用于背景音乐的按钮。
我从一个从未开始的项目中获得了我需要的大部分硬件。所以首先我下载了 Arduino Desktop IDE。我的电脑无法识别 Arduino——中国芯片所需的驱动程序。现在我可以开始了。
很快我就明白我需要一张用于文件的 SD 卡和一张用于音乐的 SD 卡。完毕。
使用此链接很容易。获得更大的屏幕并使用此处步骤 1 中的代码来计算 LCD 的正确地址。我写了以下代码:
//YWROBOT
//Compatible with the Arduino IDE 1.0
//Library version:1.1
#include
#include
LiquidCrystal_I2C lcd(0x3F,20,4); // set the LCD address to 0x3F for a 20 chars and 4 line display
int i=0;
int n=0;
void setup()
{
Serial.begin(9600);
lcd.init(); // initialize the lcd
// Print a message to the LCD.
lcd.backlight();
lcd.setCursor(1,0);
lcd.print("Hello, world!");
lcd.setCursor(0,1);
lcd.print("Ywrobot Arduino!");
}
void loop()
{
delay(1000);
lcd.clear();
n = i%7;
if (n < 1)
{
lcd.setCursor(1,0);
lcd.print("BOOOOM!!");
Serial.println("BOOM!");
}
else
{
Serial.println(i%7);
lcd.setCursor(0,1);
lcd.print(i);
}
i++;
}
使用Random 函数,我编写了一个测试代码——在屏幕上生成 1 到 20 之间的随机数,上面有文字:
#include
#include
LiquidCrystal_I2C lcd(0x3F,20,4); // set the LCD address to 0x27 for a 16 chars and 2 line display
int i=0;
int n=0;
void setup()
{
Serial.begin(9600);
lcd.init(); // initialize the lcd
// Print a message to the LCD.
lcd.backlight();
lcd.setCursor(1,0);
lcd.print("Hello, world!");
lcd.setCursor(0,1);
lcd.print("Lets roll some D20s!");
}
void loop()
{
delay(1000);
lcd.clear();
lcd.setCursor(1,0);
lcd.print("5 X D20 roll");
lcd.setCursor(0,1);
lcd.print(random(1, 21));
lcd.setCursor(3,1);
lcd.print(random(1, 21));
lcd.setCursor(6,1);
lcd.print(random(1, 21));
lcd.setCursor(9,1);
lcd.print(random(1, 21));
lcd.setCursor(12,1);
lcd.print(random(1, 21));
}
第 3 步:连接并编码一个按钮以使其工作。
我学会了如何使用这个链接做到这一点。
D20 的代码就是这样诞生的:
#include
#include
LiquidCrystal_I2C lcd(0x3F,20,4); // set the LCD address to 0x3F for a 20
int i=0;
int n=0;
// constants won't change. They're used here to set pin numbers:
const int BUTTON_PIN_D20 = 7; // the number of the pushbutton pin
// this code shows on LCD 5 random D20 result when pushing a buuton!
// Variables will change:
int currentStateD20; // the current reading from the input pin
void setup()
{
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
lcd.init(); // initialize the lcd
// Print a message to the LCD.
lcd.backlight();
lcd.setCursor(0,2);
lcd.print("Hello, DM all mighty");
// initialize the pushbutton pin as an pull-up input
// the pull-up input pin will be HIGH when the switch is open and LOW when the switch is closed.
pinMode(BUTTON_PIN_D20, INPUT_PULLUP);
}
void loop()
{
// read the state of the switch/button:
currentStateD20 = digitalRead(BUTTON_PIN_D20);
if(currentStateD20 == LOW)
{
lcd.clear();
lcd.setCursor(1,0);
lcd.print("5 X D20 roll");
lcd.setCursor(0,2);
lcd.print(random(1, 21));
lcd.setCursor(3,2);
lcd.print(random(1, 21));
lcd.setCursor(6,2);
lcd.print(random(1, 21));
lcd.setCursor(9,2);
lcd.print(random(1, 21));
lcd.setCursor(12,2);
lcd.print(random(1, 21));
//delay(1000);
}
}
首先,我学会了读写 SD 卡。但这就是读取整个文件的方法,我只需要一个特定的行!幸运的是,我找到了这篇文章并使用了@septillion代码:
voidprintLineN(unsigned int lineNumer){
myFile.seek(0);
char cr;
for(unsigned int i = 0; i < (lineNumber -1);){
cr = MyFile.read()
if(cr == '\n'){
i++;
}
}
//Now we areat the right line
while(true){
cr = myFile.read();
Serial.write(cr);
if(cr == '\n'){
break;
}
}
//a for loopwith a read limit might be a good idea
}
我必须承认,我一开始并不理解代码并且害怕使用它。寻找其他解决方案(甚至考虑构建一个服务器来与 Arduino 与 WIFI 通信),最终有勇气使用这段代码并将其用于我的项目 - 它就像魔术一样工作。
另一位朋友 (Ofir Sofer) 帮助我处理了 TXT 文件的内容,而我正在攻克这一领域。我构建了以下函数,它工作正常,但有一个小错误——一个不需要的整理字符。
经过多次尝试,我通过添加以下代码行找到了此错误的解决方案:
//closing the string without \n\r which adds unwanted char in the end
rnd_string[j-2]= 0;
以及整个功能代码:
// this function finds the needed line (lineNumber) in a txt file from
//sd card (indecated by filenmber) and shows it on the lcd screen
void printLineN(unsigned int lineNumber, unsigned int filenumber ){
char rnd_string[LCD_colums+1] = "";
rnd_string[1] = 0;
char cr;
// SD card initialization
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.print(F("Initializing SD card..."));
if (!SD.begin(10)) {
Serial.println(F("initialization failed!"));
while (1);
}
Serial.println(F("initialization done."));
// finding the correct file to open
switch (filenumber) {
case 1: {myFile = SD.open("monsters.txt");
break;}
case 2: {myFile = SD.open("spells.txt");
break;}
case 3: {myFile = SD.open("DMD.txt");
break;}
case 4: {myFile = SD.open("item.txt");
break;}
case 5: {myFile = SD.open("NPCtrait.txt");
break;}
}
myFile.seek(0);
Serial.println(F("file opened sucssesfuly."));
// seeking the right line in the file
for(unsigned int i = 0; i < (lineNumber -1);){
cr = myFile.read();
if(cr == '\n'){
i++;
}
}
int j=0; //string index
cr = ' '; // initialization of cr to get inside while loop
//Now we are at the right line
while(cr != '\n'){
cr = myFile.read();
Serial.println(cr);
rnd_string[j] = cr;
j++;
//if string is bigger than LCD max columns than print to LCD
//and move one row down
if (j == LCD_colums) {
if (rnd_string[j] == '\n')
rnd_string[j-1] = 0;
else if (rnd_string[j] == '\r')
rnd_string[j-1] = 0;
lcd.setCursor(0,1);
//print first row
lcd.print(rnd_string);
// zero the string and the counter
rnd_string[0] = 0;
j=0;
}
}
//closing the string without \n\r which adds unwanted char in the end
rnd_string[j-2] = 0;
lcd.setCursor(0,2);
//printing the string to LCD
lcd.print(rnd_string);
// close the file:
myFile.close();
}
第 5 步:无法连接和使用 MP3 播放器模块
我有这部分“HW-195-JL”:
这是一个有用的部分——有一个非常强大的放大器,作为一个独立的工作——所以我需要弄清楚如何向它发送命令并继续使用 Arduino 代码。但它只有 3 个控件!返回 | 播放 | 固件。我希望它在触发按钮时播放特定文件。我决定尝试使用固件跳过需要的文件并找到我希望播放的文件。编码感觉很容易。与 Arduino 的连接是一个巨大的挑战!
Step5.1:焊接和理解mp3播放器
在电源连接处使用电容器以减少静态噪声。
音频输出是单声道的,我将它连接到 3.5 毫米母插孔并将 RNG 连接到 TIP 以获得半立体声输出:
Step5.2:通过Arduino推荐控制mp3模块。
这几乎让我崩溃了。触发器仅适用于 3v 信号。无论我尝试什么,我都找不到从 Arduino 发送这样一个信号的方法。
然后它击中了我!我需要使用晶体管来控制 mp3 模块。
让我自己 3 个 2n2222晶体管连接到 E 到 GND,B 到 Arduino 引脚,C 到另一个连接,并尝试了一下。没用☹。经过一番谷歌搜索,我知道我需要一个 1KΩ 的电阻器(为了替换 2n2222,我可能会用 5V 烧毁)。最后,它奏效了!
[然后我决定把所有东西都焊接得更好,但它不再起作用了——我放弃了这部分,买了另一个模块]
Step5.3:编写代码。
毕竟,到目前为止,我了解到,这部分的代码感觉非常简单。
因此,我编写了代码,并在循环代码开始运行时听到了可怕的跳过声音。经过一小时的逐个检查代码和硬件连接后,我认为 Arduino 中的 PIN 3 是导致它的原因,并将一个按钮移到另一个引脚。有效!直到它不起作用☹
const int transistor_back = 6; // back connected to digital pin 6
const int transistor_play = 4; // back connected to digital pin 4
const int transistor_FW = 5; // back connected to digital pin 5
const int BUTTON_PIN_city = 7; // activation city button connected to digital pin 7
const int BUTTON_PIN_tavern = 12; // activation tavern button connected to digital pin 12
const int BUTTON_PIN_nature = 11; // activation nature button connected to digital pin 11
const int BUTTON_PIN_rain = 10; // activation rain button connected to digital pin 10
const int BUTTON_PIN_battle = 9; // activation battle button connected to digital pin 9
const int BUTTON_PIN_general = 8; // activation general button connected to digital pin 8
int currentState1 = 0;
int currentState2 = 0;
int currentState3 = 0;
int currentState4 = 0;
int currentState5 = 0;
int currentState6 = 0;
int currentSong = 1;
void setup() {
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
// initialize the pushbutton pin as an pull-up input
// the pull-up input pin will be HIGH when the switch is open and LOW when the switch is closed.
pinMode(BUTTON_PIN_city, INPUT_PULLUP);
pinMode(BUTTON_PIN_tavern, INPUT_PULLUP);
pinMode(BUTTON_PIN_nature, INPUT_PULLUP);
pinMode(BUTTON_PIN_rain, INPUT_PULLUP);
pinMode(BUTTON_PIN_battle, INPUT_PULLUP);
pinMode(BUTTON_PIN_general, INPUT_PULLUP);
pinMode(transistor_back, OUTPUT); // sets the transistor pin as output
pinMode(transistor_play, OUTPUT); // sets the transistor pin as output
pinMode(transistor_FW, OUTPUT); // sets the transistor pin as output
digitalWrite (transistor_back, LOW);
digitalWrite (transistor_FW, LOW);
Serial.println("playing the greetings sound");
delay(19000);
// at this moment I returned to the point that I'm unable to send the right massage to the MP3 player
digitalWrite (transistor_play, HIGH);
delay(100);
digitalWrite (transistor_play, LOW);
Serial.println("done play");
}
void FW(int k) {
Serial.println("start FW");
if (k < 0) k = k+7;
for (int i = 0 ; i < k ; i++){
digitalWrite (transistor_FW, HIGH);
delay(100);
digitalWrite (transistor_FW, LOW);
delay(100);
}
}
void back(int k) {
Serial.println("start back");
if (k < 0) k = k+7;
for (int i = 0 ; i < k ; i++){
digitalWrite (transistor_back, HIGH);
delay(100);
digitalWrite (transistor_back, LOW);
delay(100);
}
}
void play() {
digitalWrite (transistor_play, HIGH);
delay(100);
digitalWrite (transistor_play, LOW);
}
void loop() {
Serial.println("start loop");
//read city button
currentState1 = digitalRead(BUTTON_PIN_city);
if(currentState1 == LOW)
{
if (currentSong == 2) play();
FW(2 - currentSong);
currentSong = 2;
}
//read tavern button
currentState2 = digitalRead(BUTTON_PIN_tavern);
if(currentState2 == LOW)
{
if (currentSong == 3) play();
FW(3 - currentSong);
currentSong = 3;
}
//read Nature button
currentState3 = digitalRead(BUTTON_PIN_nature);
if(currentState3 == LOW)
{
if (currentSong == 4) play();
FW(4 - currentSong);
currentSong = 4;
}
//read Rain button
currentState4 = digitalRead(BUTTON_PIN_rain);
if(currentState4 == LOW)
{
if (currentSong == 5) play();
FW(5 - currentSong);
currentSong = 5;
}
//read Battle button
currentState5 = digitalRead(BUTTON_PIN_battle);
if(currentState5 == LOW)
{
if (currentSong == 6) play();
FW(6 - currentSong);
currentSong = 6;
}
//read General button
currentState6 = digitalRead(BUTTON_PIN_general);
if(currentState6 == LOW)
{
if (currentSong == 7) play();
FW(7 - currentSong);
currentSong = 7;
}
}
再次第 5 步 – 从头开始 MP3 播放器
我又买了一个模块——YX6300 UART TTL串口MP3音乐播放模块
这个模块要简单得多,但缺少放大器。
发现这篇文章让一切变得简单。我很快就编写了代码,唯一的挑战是弄清楚模块如何对文件进行排序——按创建日期。
该模块能够通过 Arduino 和模块之间的通信来播放特定文件以及更多功能(通信功能在我链接的帖子中的代码中)。
压轴 MP3 代码:
// COPYIED FROM: https://create.arduino.cc/projecthub/moreirarobotics/how-to-use-the-yx5300-mp3-module-catalex-with-arduino-171a23
// Edited by Dror Moshe Aharoni
// pins connection: 7-12 - music buttons, 5 to mp3 TX, 6 to MP3 RX
#include
#define ARDUINO_RX 5 //should connect to TX of the Serial MP3 Player module
#define ARDUINO_TX 6 //connect to RX of the module
SoftwareSerial mp3(ARDUINO_RX, ARDUINO_TX);
//#define mp3 Serial3 // Connect the MP3 Serial Player to the Arduino MEGA Serial3 (14 TX3 -> RX, 15 RX3 -> TX)
static int8_t Send_buf[8] = {0}; // Buffer for Send commands.
static uint8_t ansbuf[10] = {0}; // Buffer for the answers.
String mp3Answer; // Answer from the MP3.
String sanswer(void);
String sbyte2hex(uint8_t b);
int BUTTON_PIN;
int last_pushed;
int buttonState;
int currentSong = 1;
int pause = 0;
/************ Command byte **************************/
#define CMD_NEXT_SONG 0X01 // Play next song.
#define CMD_PREV_SONG 0X02 // Play previous song.
#define CMD_PLAY_W_INDEX 0X03
#define CMD_VOLUME_UP 0X04
#define CMD_VOLUME_DOWN 0X05
#define CMD_SET_VOLUME 0X06
#define CMD_SNG_CYCL_PLAY 0X08 // Single Cycle Play.
#define CMD_SEL_DEV 0X09
#define CMD_SLEEP_MODE 0X0A
#define CMD_WAKE_UP 0X0B
#define CMD_RESET 0X0C
#define CMD_PLAY 0X0D
#define CMD_PAUSE 0X0E
#define CMD_PLAY_FOLDER_FILE 0X0F
#define CMD_STOP_PLAY 0X16
#define CMD_FOLDER_CYCLE 0X17
#define CMD_SHUFFLE_PLAY 0x18 //
#define CMD_SET_SNGL_CYCL 0X19 // Set single cycle.
#define CMD_SET_DAC 0X1A
#define DAC_ON 0X00
#define DAC_OFF 0X01
#define CMD_PLAY_W_VOL 0X22
#define CMD_PLAYING_N 0x4C
#define CMD_QUERY_STATUS 0x42
#define CMD_QUERY_VOLUME 0x43
#define CMD_QUERY_FLDR_TRACKS 0x4e
#define CMD_QUERY_TOT_TRACKS 0x48
#define CMD_QUERY_FLDR_COUNT 0x4f
/************ Opitons **************************/
#define DEV_TF 0X02
/*********************************************************************/
void setup()
{
// starting the serial communication through the mp3 object
// The mp3 module is controlled through commands received by the Arduino serial. In this process, we used the SoftwareSerial library and emulated a serial on the Arduino digital pins.
// Thus, you will be able to use the Arduino to control the MP3 module through commands sent to it.
Serial.begin(9600);
mp3.begin(9600);
delay(500);
// initialization of the MP3 Card module
sendCommand(CMD_SEL_DEV, 0, DEV_TF);
delay(500);
// initialize the pushbutton pins as an pull-up input
// the pull-up input pin will be HIGH when the switch is open and LOW when the switch is closed.
for (BUTTON_PIN = 7; BUTTON_PIN < 13; BUTTON_PIN++){
//BUTTON_PIN is the number of the pushbutton pin
pinMode(BUTTON_PIN, INPUT_PULLUP);
}
sendCommand(0x06, 0 , 30);
Serial.println("playing the greetings sound");
sendCommand(0x03, 0 , 1);
//delay(19000);
delay(1000);
last_pushed = 1;
}
//starting loop
void loop() {
//Serial.println("start loop");
buttonState = HIGH;
BUTTON_PIN = 6;
// read the state of the switch/button:
while (buttonState == HIGH){
BUTTON_PIN++;
if (BUTTON_PIN == 13) BUTTON_PIN = 7;
buttonState = digitalRead(BUTTON_PIN);
// print out the button's state
//Serial.println(BUTTON_PIN);
//Serial.println(buttonState);
}
//
delay(500);
//Serial.println("DM pushed button:");
//Serial.println(BUTTON_PIN);
if (BUTTON_PIN == last_pushed){
switch (pause) {
case 0:
sendCommand(0x0E);
last_pushed = BUTTON_PIN;
pause = 1;
sanswer();
break;
case 1:
pause = 0;
sendCommand(0x03, 0, BUTTON_PIN-5);
if (mp3.available()) Serial.println(decodeMP3Answer());
break;
}
}
else
{
// saving the last pushed button in order to enable music pause
last_pushed = BUTTON_PIN;
// playing the desired music file
sendCommand(0x03, 0, BUTTON_PIN-5);
//delay(3000);
// Check for the answer.
if (mp3.available()) Serial.println(decodeMP3Answer());
}
}
/********************************************************************************/
/*Function sendMP3Command: seek for a 'c' command and send it to MP3 */
/*Parameter: c. Code for the MP3 Command, 'h' for help. */
/*Return: void */
void sendMP3Command(char c) {
switch (c) {
case '?':
case 'h':
Serial.println("HELP ");
Serial.println(" p = Play");
Serial.println(" P = Pause");
Serial.println(" > = Next");
Serial.println(" < = Previous");
Serial.println(" s = Stop Play");
Serial.println(" + = Volume UP");
Serial.println(" - = Volume DOWN");
Serial.println(" c = Query current file");
Serial.println(" q = Query status");
Serial.println(" v = Query volume");
Serial.println(" x = Query folder count");
Serial.println(" t = Query total file count");
Serial.println(" f = Play folder 1.");
Serial.println(" S = Sleep");
Serial.println(" W = Wake up");
Serial.println(" r = Reset");
break;
case 'p':
Serial.println("Play ");
sendCommand(CMD_PLAY);
break;
case 'P':
Serial.println("Pause");
sendCommand(CMD_PAUSE);
break;
case '>':
Serial.println("Next");
sendCommand(CMD_NEXT_SONG);
sendCommand(CMD_PLAYING_N); // ask for the number of file is playing
break;
case '<':
Serial.println("Previous");
sendCommand(CMD_PREV_SONG);
sendCommand(CMD_PLAYING_N); // ask for the number of file is playing
break;
case 's':
Serial.println("Stop Play");
sendCommand(CMD_STOP_PLAY);
break;
case '+':
Serial.println("Volume Up");
sendCommand(CMD_VOLUME_UP);
break;
case '-':
Serial.println("Volume Down");
sendCommand(CMD_VOLUME_DOWN);
break;
case 'c':
Serial.println("Query current file");
sendCommand(CMD_PLAYING_N);
break;
case 'q':
Serial.println("Query status");
sendCommand(CMD_QUERY_STATUS);
break;
case 'v':
Serial.println("Query volume");
sendCommand(CMD_QUERY_VOLUME);
break;
case 'x':
Serial.println("Query folder count");
sendCommand(CMD_QUERY_FLDR_COUNT);
break;
case 't':
Serial.println("Query total file count");
sendCommand(CMD_QUERY_TOT_TRACKS);
break;
case 'f':
Serial.println("Playing folder 1");
sendCommand(CMD_FOLDER_CYCLE, 1, 0);
break;
case 'S':
Serial.println("Sleep");
sendCommand(CMD_SLEEP_MODE);
break;
case 'W':
Serial.println("Wake up");
sendCommand(CMD_WAKE_UP);
break;
case 'r':
Serial.println("Reset");
sendCommand(CMD_RESET);
break;
}
}
/********************************************************************************/
/*Function decodeMP3Answer: Decode MP3 answer. */
/*Parameter:-void */
/*Return: The */
String decodeMP3Answer() {
String decodedMP3Answer = "";
decodedMP3Answer += sanswer();
switch (ansbuf[3]) {
case 0x3A:
decodedMP3Answer += " -> Memory card inserted.";
break;
case 0x3D:
decodedMP3Answer += " -> Completed play num " + String(ansbuf[6], DEC);
//sendCommand(CMD_NEXT_SONG);
//sendCommand(CMD_PLAYING_N); // ask for the number of file is playing
break;
case 0x40:
decodedMP3Answer += " -> Error";
break;
case 0x41:
decodedMP3Answer += " -> Data recived correctly. ";
break;
case 0x42:
decodedMP3Answer += " -> Status playing: " + String(ansbuf[6], DEC);
break;
case 0x48:
decodedMP3Answer += " -> File count: " + String(ansbuf[6], DEC);
break;
case 0x4C:
decodedMP3Answer += " -> Playing: " + String(ansbuf[6], DEC);
break;
case 0x4E:
decodedMP3Answer += " -> Folder file count: " + String(ansbuf[6], DEC);
break;
case 0x4F:
decodedMP3Answer += " -> Folder count: " + String(ansbuf[6], DEC);
break;
}
return decodedMP3Answer;
}
/********************************************************************************/
/*Function: Send command to the MP3 */
/*Parameter: byte command */
/*Parameter: byte dat1 parameter for the command */
/*Parameter: byte dat2 parameter for the command */
void sendCommand(byte command){
sendCommand(command, 0, 0);
}
void sendCommand(byte command, byte dat1, byte dat2){
delay(20);
Send_buf[0] = 0x7E; //
Send_buf[1] = 0xFF; //
Send_buf[2] = 0x06; // Len
Send_buf[3] = command; //
Send_buf[4] = 0x01; // 0x00 NO, 0x01 feedback
Send_buf[5] = dat1; // datah
Send_buf[6] = dat2; // datal
Send_buf[7] = 0xEF; //
Serial.print("Sending: ");
for (uint8_t i = 0; i < 8; i++)
{
mp3.write(Send_buf[i]) ;
Serial.print(sbyte2hex(Send_buf[i]));
}
Serial.println();
}
/********************************************************************************/
/*Function: sbyte2hex. Returns a byte data in HEX format. */
/*Parameter:- uint8_t b. Byte to convert to HEX. */
/*Return: String */
String sbyte2hex(uint8_t b)
{
String shex;
shex = "0X";
if (b < 16) shex += "0";
shex += String(b, HEX);
shex += " ";
return shex;
}
/********************************************************************************/
/*Function: shex2int. Returns a int from an HEX string. */
/*Parameter: s. char *s to convert to HEX. */
/*Parameter: n. char *s' length. */
/*Return: int */
int shex2int(char *s, int n){
int r = 0;
for (int i=0; i if(s[i]>='0' && s[i]<='9'){
r *= 16;
r +=s[i]-'0';
}else if(s[i]>='A' && s[i]<='F'){
r *= 16;
r += (s[i] - 'A') + 10;
}
}
return r;
}
/********************************************************************************/
/*Function: sanswer. Returns a String answer from mp3 UART module. */
/*Parameter:- uint8_t b. void. */
/*Return: String. If the answer is well formated answer. */
String sanswer(void)
{
uint8_t i = 0;
String mp3answer = "";
// Get only 10 Bytes
while (mp3.available() && (i < 10))
{
uint8_t b = mp3.read();
ansbuf[i] = b;
i++;
mp3answer += sbyte2hex(b);
}
// if the answer format is correct.
if ((ansbuf[0] == 0x7E) && (ansbuf[9] == 0xEF))
{
return mp3answer;
}
return "???: " + mp3answer;
}
第 6 步:电源
我买了一个电源模块,不知道真名是什么“MB-102 MB102”(?)
我将两个 Arduino 都连接到该模块,因此 DM 控制台只需要一个电源输入。
完美运行,并最大限度地减少了到控制台的连接插座。
第7步:化妆品=^)
步骤 7.1:前面板。一位好朋友 (Benny Klingman) 使用他的Fusion 360技能获得了很多帮助,并在该项目的其他部分担任顾问。他为我们工作的 FAB-LAB 中碰巧拥有的激光切割机创建了“dxf”文件(我只在角落添加了我的徽标),并为所有按钮创建了“STL”文件(我们使用了 thenounproject.com图标)。这是添加所有电子设备之前的样子:
在这里您可以看到按钮布局的计划。我使用焊接面包板来安装按钮并直接从另一侧焊接跳线。在该设备的开发过程中多次重新焊接电线是一个错误的决定——更好的做法是焊接电线连接器。我将物理按钮的 3D 打印部分粘合(用快速胶水)到电子按钮上。我用激光切割了一块额外的木板,并将焊接的面包板夹在两块木板之间,这样在按下按钮时就会产生反作用力。侧面需要一些缓冲木部件,以防止不必要的按钮点击。
第 7.2 部分:洞穴箱。
我有一个书本形状的盒子,所以我用黑色喷漆涂了封面,然后用激光雕刻了一些图形。我需要切割和更换后面板的一部分,以便为所有外部连接(电源、音频)安排一个合适的位置。
在确定如何通过外部连接稳定模块时遇到了一些挑战。
最后,我再次使用激光切割机切割了一块有机玻璃,从内部锁定模块,从外部锁定 3 毫米白杨木。
第 8 部分:压轴组装和功能
压轴液晶代码:
// this code is a DM consul - 1 button shows on LCD 5 random D20 result , 2nd button shows a random speel (from SD card), 3rd button shows a random monster (from SD card).
// 4 - random DM decision, 5 -random magic item, 6 -random NPC (race + trait), 7 - random gold treasure (1-500)
#include
#include
#include
#include
File myFile;
int LCD_colums = 20;
int LCD_rows = 4;
LiquidCrystal_I2C lcd(0x3F,LCD_colums,LCD_rows); // set the LCD address to 0x27 for a 16 chars and 2 line display
int n=0;
int rnd=0;
int DLY=0;
// defining string arrays of races
char *race[22] = {"Dwarf", "Elf", "Halfling" , "Human" , "Gnome" ,"Half-orc" , "Dragonborn", "Tiefling", "Aasimar", "Warforged",
"Yuan-ti-Pureblood", "Triton", "Goliath", "Tabaxi", "Half-Elf" , "LizardFolk", "Genasi" , "Aarakocra" ,"Bugbear" , "Kenku", "Githyanki", "Tortle"};
// constants won't change. They're used here to set pin numbers:
const int BUTTON_PIN_D20 = 7; // the number of the d20 pushbutton pin
const int BUTTON_PIN_SPELL = 6; // the number of the spell pushbutton pin
const int BUTTON_PIN_MONSTER = 8; // the number of the monster pushbutton pin
const int BUTTON_PIN_DM = 9; // the number of the DM decision pushbutton pin
const int BUTTON_PIN_item = 5; // the number of the Magic items pushbutton pin
const int BUTTON_PIN_NPC = 4; // the number of the NPC characters pushbutton pin
const int BUTTON_PIN_gold = 3; // the number of the NPC characters pushbutton pin
// Variables will change:
int currentStateD20; // the current reading from the input pin
int currentStateSPELL; // the current reading from the input pin
int currentStateMONSTER;
int currentStateDM; // the current reading from the input pin
int currentStateitem; // the current reading from the input pin
int currentStateNPC; // the current reading from the input pin
int currentStategold; // the current reading from the input pin
void setup()
{
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
lcd.init(); // initialize the lcd
// Print a message to the LCD.
lcd.backlight();
lcd.setCursor(0,1);
lcd.print(F("Hello, DM Yoni Zabow"));
// initialize the pushbutton pin as an pull-up input
// the pull-up input pin will be HIGH when the switch is open and LOW when the switch is closed.
pinMode(BUTTON_PIN_D20, INPUT_PULLUP);
pinMode(BUTTON_PIN_SPELL, INPUT_PULLUP);
pinMode(BUTTON_PIN_MONSTER, INPUT_PULLUP);
pinMode(BUTTON_PIN_DM, INPUT_PULLUP);
pinMode(BUTTON_PIN_item, INPUT_PULLUP);
pinMode(BUTTON_PIN_NPC, INPUT_PULLUP);
pinMode(BUTTON_PIN_gold, INPUT_PULLUP);
}
// this function finds the needed line (lineNumber) in a txt file from sd card (indecated by filenmber) and shows it on the lcd screen
void printLineN(unsigned int lineNumber, unsigned int filenumber ){
char rnd_string[LCD_colums+1] = "";
rnd_string[1] = 0;
char cr;
// SD card initialization
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.print(F("Initializing SD card..."));
if (!SD.begin(10)) {
Serial.println(F("initialization failed!"));
while (1);
}
Serial.println(F("initialization done."));
// finding the correct file to open
switch (filenumber) {
case 1: {myFile = SD.open("monsters.txt");
break;}
case 2: {myFile = SD.open("spells.txt");
break;}
case 3: {myFile = SD.open("DMD.txt");
break;}
case 4: {myFile = SD.open("item.txt");
break;}
case 5: {myFile = SD.open("NPCtrait.txt");
break;}
}
myFile.seek(0);
Serial.println(F("file opened sucssesfuly."));
// seeking the right line in the file
for(unsigned int i = 0; i < (lineNumber -1);){
cr = myFile.read();
if(cr == '\n'){
i++;
}
}
int j=0; //string index
cr = ' '; // initialization of cr to get inside while loop
//Now we are at the right line
while(cr != '\n'){
cr = myFile.read();
Serial.println(cr);
rnd_string[j] = cr;
j++;
//if string is bigger than LCD max columns than print to LCD and move one row down
if (j == LCD_colums) {
if (rnd_string[j] == '\n')
rnd_string[j-1] = 0;
else if (rnd_string[j] == '\r')
rnd_string[j-1] = 0;
lcd.setCursor(0,1);
//print first row
lcd.print(rnd_string);
// zero the string and the counter
rnd_string[0] = 0;
j=0;
}
}
//closing the string without \n\r which adds unwanted char in the end
rnd_string[j-2] = 0;
lcd.setCursor(0,2);
//printing the string to LCD
lcd.print(rnd_string);
// close the file:
myFile.close();
}
void loop()
{
if (DLY == 7000){
DLY = 0;
lcd.clear();
lcd.setCursor(0,1);
lcd.print(F("Hello, DM Yoni Zabow"));
}
// read the state of the switch/button:
currentStateD20 = digitalRead(BUTTON_PIN_D20);
if(currentStateD20 == LOW)
{
lcd.clear();
lcd.setCursor(1,0);
lcd.print(F("5 X D20 roll"));
lcd.setCursor(0,2);
lcd.print(random(1, 21));
lcd.setCursor(3,2);
lcd.print(random(1, 21));
lcd.setCursor(6,2);
lcd.print(random(1, 21));
lcd.setCursor(9,2);
lcd.print(random(1, 21));
lcd.setCursor(12,2);
lcd.print(random(1, 21));
DLY = 0;
}
// read the state of the switch/button:
currentStateSPELL = digitalRead(BUTTON_PIN_SPELL);
if(currentStateSPELL == LOW)
{
lcd.clear();
lcd.setCursor(0,0);
lcd.print(F("RND Spell Name&LVL:"));
rnd = random(1, 460);
Serial.println(rnd);
printLineN(rnd,2);
DLY = 0;
}
currentStateMONSTER = digitalRead(BUTTON_PIN_MONSTER);
if(currentStateMONSTER == LOW)
{
lcd.clear();
lcd.setCursor(0,0);
lcd.print(F("Monster Name|AC|HP:"));
rnd = random(1, 507);
Serial.println(rnd);
printLineN(rnd,1);
DLY = 0;
}
currentStateDM = digitalRead(BUTTON_PIN_DM);
if(currentStateDM == LOW)
{
lcd.clear();
lcd.setCursor(0,0);
lcd.print(F("RND DM Decision:"));
rnd = random(1, 25);
Serial.println(rnd);
printLineN(rnd,3);
DLY = 0;
}
currentStateitem = digitalRead(BUTTON_PIN_item);
if(currentStateitem == LOW)
{
lcd.clear();
lcd.setCursor(0,0);
lcd.print(F("RND Magic item:"));
rnd = random(1, 240);
Serial.println(rnd);
printLineN(rnd,4);
DLY = 0;
}
currentStateNPC = digitalRead(BUTTON_PIN_NPC);
if(currentStateNPC == LOW)
{
lcd.clear();
lcd.setCursor(0,0);
lcd.print(F("RND NPC Trait:"));
rnd = random(1, 1389);
Serial.println(rnd);
printLineN(rnd,5);
lcd.setCursor(0,3);
lcd.print("Race: ");
lcd.setCursor(6,3);
rnd = random(0, 21);
lcd.print(race[rnd]);
DLY = 0;
}
currentStategold = digitalRead(BUTTON_PIN_gold);
if(currentStategold == LOW)
{
lcd.clear();
lcd.setCursor(0,0);
lcd.print(F("RND Gold treature:"));
rnd = random(1, 501);
Serial.println(rnd);
lcd.setCursor(0,2);
lcd.print(rnd);
DLY = 0;
}
DLY++;
Serial.println(DLY);
}
看起来:
演示:
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